RPG Makers mostly feature toolkits to build your RPG world, the things within and the story. Most try to be easy to use while still versatile. RPG engines might be less versatile and focus on a specific type of game, but they can also be more versatile, requirering additional progamming to be done.

The H-World CRPG engine is a tile-based, turn-based, Lua scriptable engine that supports a nice graphical, isometric or rectangular 2D display. It can support single PC as well as parties. There is AI support for both combat and non-combat actions. H-World is available for Windows and Linux.

Creating a "Fork" of the original OHRRPGCE and porting it to monkey http://monkeycoder.co.nz/, this is going to be a major revamp for graphics.
You can view the Live progress of the Monkey port by checking out the HTML5 Custom Editor here
http://vigilsoft.net/hamster2